Change SSH KEY on CentOS

[Montral Cordin]

I tried to change the SSH key of my Centos server through the tutorial below:

https://vpsmakers.com/how-to-change-and-create-ssh-key-on-linux/

and now I can't connect to my server.
Can you check this article's code and give me the problem to solve this problem?
Any theory is welcome

 

[vs2-free-users]

In the most cases. The providers have a rescue system. There you can mount your original os and change the config and keys.

Here is the description for vs2-frees:

Manual Linux Rescue System/en – EUserv Wiki

www.euserv.com

 

[KGIII]

Here is the description for vs2-frees:

I have an interesting (I think) project idea. Do you mind if I PM you to ask about this 'free' server you speak of?